Method of making a magnetic recording medium
US4386113A · kind A · utility
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3Claims
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Assignee
Inventor
Key dates
| Filing date | May 29, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | May 29, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of making a magnetic recording medium including a step of continuously depositing a ferromagnetic layer with the use of electron beam for heating an evaporation source material. A container for retaining said source material in a heating position is made of a ceramics having a composition comprising 97 to 99 wt % of MgO, 0.2 to 0.5 wt % of Al.sub.2 O.sub.3 and 0.4 to 1 wt % of SiO.sub.2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.